This landmark Victorian folly rewards visitors with spectacular views over the Peak District.

A spectacular disused railway viaduct in a beautiful countryside nature reserve.

Wooden sleds have replaced donkeys to cart goods around this utterly charming car-free village.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

The red letters in the literary pavement leading to the library form a mysterious code.

A collection of machines designed to break things for science.

A dramatic sculpture high up in Yorkshire with vistas on an industrial scale.

A mysterious ruin shrouded in more folklore than fact.

William Smith's iconic "map that changed the world" is hidden behind a curtain in the Geological Society building.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

This Roman quarry once held secret masses and smuggler's contraband and is now home to rare species of bats.

The metal frame is all that's left of a wicker sculpture which once towered over the M5 motorway.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

A collection of early 19th century trams set in a reconstructed period village.

The highest lighthouse in Scotland shines from an abandoned island.

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

This 15th-century fortification was built to defend bunnies.

A relic of Victorian grandeur hides beneath a busy South London road.

In an arboretum with hundreds of memorials to the fallen, this one might be the most poignant.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

These centuries old gardens have been restored to their 17th century condition.